Author: Makarewicz, R.

Source: Acta Acustica united with Acustica, Volume 67, Number 1, November 1988 , pp. 45-51(7)

Publisher: S. Hirzel Verlag

Abstract:

Sound attenuation α (ω) and speed dispersion c (ω) are examined when viscosity, heat conduction and relaxation are not “very small“. The power series of the dispersion equation has been used to derive generalized formulae for α and c. These relations are used for the determination of the fluid parameters.

Zusammenfassung

Die Schalldämpfung α (ω) und Dispersion der Schallgeschwindigkeit c (ω) werden für den Fall untersucht, daß die Viskosität, die Wärmeleitung und die Relaxation nicht ,,sehr klein“ sind. Mit Hilfe einer Potenzreihenentwicklung der Dispersionsgleichung werden verallgemeinerte Formeln für α und c hergeleitet. Diese Beziehungen werden zur Bestimmung der Parameter des Fluids herangezogen.

Sommaire

On étudie l'atténuation du son α (ω) et la dispersion de la célérité c (ω) dans un fluide où la viscosité, la conductibilité thermique et la relaxation ne sont pas «très petites ». Pour cela, on a développé l'équation de dispersion en série de puissance et on en a déduit des formules généralisées pour α et c. Ces relations fournissent les paramètres physiques du fluide.

Document Type: Research article

Publication date: 1988-11-01

More about this publication?

• Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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